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    <title>Array.filter()</title>
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<body>
    <h1>JavaScript Array.filter()</h1>
    <p>使用通过测试的所有数组元素创建一个新数组。</p>
    <p id="demo"></p>
    <script>
        var numbers = [45, 4, 9, 16, 25];
        var over18 = numbers.filter(myFunction);

        document.getElementById("demo").innerHTML = over18;

        function myFunction(value, index, array) {
            return value > 18;
        }
    </script>
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